Question

find the area of this circle. use 3.14 for π. area of a circle a = πr² a = ? cm² round your answer to the nearest tenth.

Explanation:

Step1: Find the radius

The diameter is \(8\) cm, so the radius \(r=\frac{8}{2}=4\) cm.

Step2: Substitute into the area formula

Using \(A = \pi r^{2}\) and \(\pi = 3.14\), we have \(A=3.14\times4^{2}\).
First calculate \(4^{2}=16\), then \(A = 3.14\times16\).
\(3.14\times16=(3 + 0.14)\times16=3\times16+0.14\times16=48+2.24 = 50.24\).

Answer:

\(50.2\)